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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1  
Old 13th February 2018
schaffersshovel schaffersshovel is offline
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Default 1988 106 inch build ( agent orange )

Taking what was a 96 inch to 106 , long rod motor with race peeped std heads, axtell 3 13/16 cylinders , JE Pistons from axtell with Baisley 30 degree piston chambers matched to heads, cams are my issue because I have to many to chose from, I have red shift .723 , Andrews .500 lift I believe n8 or v8 , and I have 1 set each of the Edelbrock cams ,,,again not sure of numbers on them but believe 1 set is .590 lift and other is .600 lift, are the red shifts streetsble ? And I was thinking about maybe try say the 2 exhaust cams from 1 set and intakes from another with the Edelbrocks , any one run these Edelbrocks ?
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  #2  
Old 13th February 2018
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RS 723 and Andrews V8 are different animals. (very different).
It depends many on the cc of the combustion chambers volume.
Probably with 723 you can run 12:1 compression (not with Andrews V8).
All (most all of) is the intake closing event.
So the edelbrock cams are totally out of range because they close the intake valve only 38 (if I correct remember) degrees .

I used edelbrock .590 lift cams when my bike was 1200 . Too prone to pinging/detonation.
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1990 Sportster Axtell 90 ci, CP Carrillo 3.875 30° deg pistons,STD Heads, 615V2 RedShift cams, HSR48,
Carrillo 9.638 rods
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  #3  
Old 13th February 2018
Jörgen Jörgen is offline
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If you need .650"+ lift but more streetable duration than RedShift 723V2 you can also consider RS625V2 and S&S 1:1.725 rockers. Then you will have .663" lift @ valve. Consider beehive springs to lessen the load on the lifters. And chose quality lifters, S&S lifters are strong.
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  #4  
Old 13th February 2018
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I'm no expert, but will the clutch assembly of a 4 speed sportster handle this?
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  #5  
Old 23rd May 2018
jkinkade jkinkade is online now
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Quote:
Originally Posted by schaffersshovel View Post
Taking what was a 96 inch to 106 , long rod motor with race peeped std heads, axtell 3 13/16 cylinders , JE Pistons from axtell with Baisley 30 degree piston chambers matched to heads, cams are my issue because I have to many to chose from, I have red shift .723 , Andrews .500 lift I believe n8 or v8 , and I have 1 set each of the Edelbrock cams ,,,again not sure of numbers on them but believe 1 set is .590 lift and other is .600 lift, are the red shifts streetsble ? And I was thinking about maybe try say the 2 exhaust cams from 1 set and intakes from another with the Edelbrocks , any one run these Edelbrocks ?
How did you go?
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